Shared Preference in android [kotlin]

 SharedPreference in android 

 class Preference(appContext: Context) {  
   private val preferenceName = "preference"  
   private val sharedPref: SharedPreferences =  
     appContext.getSharedPreferences(preferenceName, Context.MODE_PRIVATE)  
   private val editor: SharedPreferences.Editor = sharedPref.edit()  
   fun save(KEY_NAME: String, value: Int) {  
     editor.apply {  
       putInt(KEY_NAME, value)  
       commit()  
     }  
   }  
   fun save(KEY_NAME: String, value: String) {  
     editor.apply {  
       putString(KEY_NAME, value)  
       commit()  
     }  
   }  
   fun save(KEY_NAME: String, value: Boolean) {  
     editor.apply {  
       putBoolean(KEY_NAME, value)  
       commit()  
     }  
   }  
   fun getString(KEY_NAME: String): String? {  
     return sharedPref.getString(KEY_NAME, AppConstants.Default.STRING)  
   }  
   fun getBoolean(KEY_NAME: String): Boolean? {  
     return sharedPref.getBoolean(KEY_NAME, AppConstants.Default.BOOLEAN)  
   }  
   fun getInt(KEY_NAME: String): Int? {  
     return sharedPref.getInt(KEY_NAME, AppConstants.Default.INT)  
   }  
 }